Malicious PDF — malware analysis report

Static analysis result for SHA-256 49586b7558411551…

MALICIOUS

PDF

46.0 KB Created: 2020-09-02 04:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fab6d229ac2bcb0059ae54cb1349527 SHA-1: b4a1492d72ff10d9508e8365cb0d627fcaba1862 SHA-256: 49586b7558411551188003a8c160c227b0f9fc9a6c0264d7d60ce22e45e113d2
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=british+english+dictionary+free'. This indicates the document is designed to redirect users to malicious infrastructure. The presence of a PDF link farm further supports the malicious intent, likely to obscure the true destination or to generate traffic. No scripts were extracted from this sample.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=british+english+dictionary+free
    • https://static.usrfiles.com/ugd/f46427_93d936cff0cb4a4eb1864c54fd2be94a.pdf
    • https://static.usrfiles.com/ugd/94e5ef_b4b241bb2a9046a789f93a7c6d6d38f3.pdf
    • https://static.usrfiles.com/ugd/24853a_ebec32110667429883aa5faf640d151a.pdf
    • https://static.usrfiles.com/ugd/b8c837_594e62a26def4f958d9c5a3b23c604a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2221ff361a9486cbb9e7216a1bcb6bd.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6645/files/89518491604.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bukidesokat.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0296/files/effortless_english_club.pdf
    • https://cdn.shopify.com/s/files/1/0432/0349/4043/files/calculus_11th_edition_larson_and_edwards_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/maplestory_m_apk_mod_2019.pdf
    • https://cdn.shopify.com/s/files/1/0434/0930/9848/files/49410025937.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007573.bin
fe5ec269f2243c98112c24151a36f5aa71c271c38a85b3ca25d0282cd5d25ee9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7573 5436 bytes
font_01_sfnt_off000087fa.bin
7bdf8264fffcce7f0f0cca46d734c1a82f0ce4b360821fa0d11f93bd1b7a421b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87FA 10528 bytes

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